Information Acquiring Method, Terminal, Base Station, and System

ABSTRACT

Embodiments disclose an information acquiring method. The method includes sending indicating information, where the indicating information indicates a resource set used for sending initial information, and the initial information comprises a master information block (MIB); and determining, according to the resource set used for sending initial information, a resource used for sending non-initial information, wherein the non-initial information comprises information carried over a physical downlink shared channel (PDSCH), and the resource used for sending the non-initial information does not overlap with the resource set used for sending initial information.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.15/068,410, filed on Mar. 11, 2016, which is a continuation ofInternational Application No. PCT/CN2013/083403, filed on Sep. 12, 2013.The disclosures of the aforementioned applications are herebyincorporated by reference in their entireties.

TECHNICAL FIELD

The present invention relates to the field of communicationstechnologies, and in particular, to an information acquiring method, aterminal, a base station, and a system.

BACKGROUND

Before accessing a network, a terminal needs to receive initialinformation sent by a base station, where the initial informationincludes system information. The system information includes: a masterinformation block (MIB), a system information block (SIB), and the like,where the MIB is carried over a physical broadcast channel (PBCH). Thesystem information is information necessary for the terminal tocommunicate with the base station before the terminal accesses thenetwork. For ease of description, unless specially stated, the systeminformation mentioned in solutions of the present invention may includea master information block or a system information block, or includeboth a master information block and a system information block.

In a coverage enhancement scenario, to enable the terminal to receivethe system information sent by the base station, the base stationrepeatedly sends the system information to the terminal, and theterminal performs joint receiving, so as to meet a requirement that theterminal may correctly receive the system information.

A current technology has the following disadvantage: to ensure thatterminals of different receiving capabilities can correctly receive thesystem information, even if coverage enhancement capabilities orrequirements requested by different cells are different, the basestation uses a widest scope of resources to send the system informationto the terminals, and the terminals receive the system information byusing the widest scope of resources. Actually, not all the terminalshave a lowest receiving capability, and therefore such a processingmanner in the current technology causes a low resource utilization rate.

SUMMARY

Embodiments of the present invention provide an information acquiringmethod, which can improve receiving efficiency of a terminal whileensuring that the terminal correctly receives initial information sentby a base station. The embodiments of the present invention furtherprovide a corresponding terminal, base station, and system.

A first aspect of the embodiments of the present invention provides aninformation acquiring method, including: acquiring initial informationaccording to at least one preset resource set, where the at least oneresource set is used to indicate a resource used to acquire the initialinformation.

With reference to the first aspect, in a first possible implementationmanner, the method further includes: parsing the initial information;and when determining information of a resource set used by a basestation to send the initial information is included in the initialinformation, determining, according to the determining information, theresource set used by the base station to send the initial information.

With reference to the first aspect or the first possible implementationmanner of the first aspect, in a second possible implementation manner,the method further includes: determining, according to the resource setused to send the initial information, a resource used to receivenon-initial information, where the non-initial information isinformation that needs to be received after a terminal completesacquiring the initial information; and receiving the non-initialinformation by using the resource used to receive the non-initialinformation.

With reference to the second possible implementation manner of the firstaspect, in a third possible implementation manner, the determining,according to the resource set used to send the initial information, aresource used to receive non-initial information includes: excludingresources indicated by all resource sets used to send the initialinformation, and determining a remaining resource obtained after theexclusion as a resource used to receive the non-initial information.

With reference to the second possible implementation manner of the firstaspect, in a fourth possible implementation manner, the determining,according to the resource set used to send the initial information, aresource used to receive non-initial information includes: excluding aresource indicated by the resource set indicated by the determininginformation, and determining a remaining resource obtained after theexclusion as a resource used to receive the non-initial information.

With reference to the third or the fourth possible implementation mannerof the first aspect, in a fifth possible implementation manner, thereceiving the non-initial information by using the resource used toreceive the non-initial information includes: receiving the non-initialinformation by using the remaining resource according to a puncturingalgorithm or a rate matching algorithm.

With reference to the first aspect, or any one of the first to the fifthpossible implementation manners of the first aspect, in a sixth possibleimplementation manner, the initial information is information necessaryfor accessing a network to perform communication; and the initialinformation includes at least one of a master information block (MIB)carried over a physical broadcast channel (PBCH), and a systeminformation block (SIB).

With reference to the first aspect, or any one of the first to the sixthpossible implementation manners of the first aspect, in a seventhpossible implementation manner, the non-initial information includes atleast one of information carried over a physical downlink controlchannel (PDCCH), information carried over an enhanced physical downlinkcontrol channel (EPDCCH), information carried over a physical downlinkshared channel (PDSCH), and a channel state information-reference signal(CSI-RS).

With reference to the first aspect, or any one of the first to theseventh possible implementation manners of the first aspect, in aneighth possible implementation manner, each resource set of the at leastone resource set includes indication information of at least one of atime-domain resource and a frequency-domain resource that carry theinitial information.

With reference to the eighth possible implementation manner of the firstaspect, in a ninth possible implementation manner, each resource setincludes indication information of at least one of a time-domainresource and a frequency-domain resource that are of a preset quantityand at a preset position, and resources indicated by the at least oneresource set do not overlap, or partially overlap.

With reference to the eighth possible implementation manner of the firstaspect, in a tenth possible implementation manner, each resource setincludes indication information of at least one of a time-domainresource and a frequency-domain resource that are of a same quantity andat a preset position, and resources indicated by the at least oneresource set do not overlap, or partially overlap.

With reference to the eighth possible implementation manner of the firstaspect, in an eleventh possible implementation manner, the resourcesindicated by the at least one resource set are in an inclusionrelationship, and after the at least one resource set is sorted inascending order of a quantity of indicated resources, resourcesindicated by a current resource set always include all resourcesindicated by a previous resource set.

With reference to the first aspect, or any one of the first to theeleventh possible implementation manners of the first aspect, in atwelfth possible implementation manner, when each resource set of the atleast one resource set indicates that resource elements REs that carrythe initial information are of a same quantity and at same positions inradio frames of each resource set, the acquiring initial informationaccording to at least one preset resource set includes: acquiring theinitial information by using the resource elements REs that are of thesame quantity and at the same positions in the radio frames of eachresource set.

A second aspect of the embodiments of the present invention provides aninformation acquiring method, including: sending initial informationaccording to at least one preset resource set, where the at least oneresource set is used to indicate a resource used to send the initialinformation.

With reference to the second aspect, in a first possible implementationmanner, determining information of a resource set used to send theinitial information is included in the initial information, so that aterminal determines, according to the determining information, aresource set used by a base station to send the initial information.

With reference to the second aspect or the first possible implementationmanner of the second aspect, in a second possible implementation manner,the method further includes: determining, according to the resource setused to send the initial information, a resource used to sendnon-initial information, where the non-initial information isinformation that needs to be sent after the initial information is sent;and sending the non-initial information by using the resource used tosend the non-initial information.

With reference to the second possible implementation manner of thesecond aspect, in a third possible implementation manner, thedetermining, according to the resource set used to send the initialinformation, a resource used to send non-initial information includes:excluding resources indicated by all resource sets used to send theinitial information, and determining a remaining resource obtained afterthe exclusion as a resource used to send the non-initial information.

With reference to the second possible implementation manner of thesecond aspect, in a fourth possible implementation manner, thedetermining, according to the resource set used to send the initialinformation, a resource used to send non-initial information includes:excluding a resource indicated by the resource set indicated by thedetermining information, and determining a remaining resource obtainedafter the exclusion as a resource used to send the non-initialinformation.

With reference to the third or the fourth possible implementation mannerof the second aspect, in a fifth possible implementation manner, thesending the non-initial information by using the resource used to sendthe non-initial information includes: sending, according to a puncturingalgorithm or a rate matching algorithm, the non-initial information byusing the resource used to send the non-initial information.

With reference to the second aspect, or any one of the first to thefifth possible implementation manners of the second aspect, in a sixthpossible implementation manner, the initial information is informationnecessary for accessing a network to perform communication; and theinitial information includes at least one of a master information block(MIB) carried over a physical broadcast channel (PBCH), and a systeminformation block (SIB).

With reference to the second aspect, or any one of the first to thesixth possible implementation manners of the second aspect, in a seventhpossible implementation manner, the non-initial information includes atleast one of information carried over a physical downlink controlchannel (PDCCH), information carried over an enhanced physical downlinkcontrol channel (EPDCCH), information carried over a physical downlinkshared channel (PDSCH), and a channel state information-reference signal(CSI-RS).

With reference to the second aspect, or any one of the first to theseventh possible implementation manners of the second aspect, in aneighth possible implementation manner, each resource set of the at leastone resource set includes indication information of at least one of atime-domain resource and a frequency-domain resource that carry theinitial information.

With reference to the eighth possible implementation manner of thesecond aspect, in a ninth possible implementation manner, each resourceset includes indication information of at least one of a time-domainresource and a frequency-domain resource that are of a preset quantityand at a preset position, and resources indicated by the at least oneresource set do not overlap, or partially overlap.

With reference to the eighth possible implementation manner of thesecond aspect, in a tenth possible implementation manner, each resourceset includes indication information of at least one of a time-domainresource and a frequency-domain resource that are of a same quantity andat a preset position, and resources indicated by the at least oneresource set do not overlap, or partially overlap.

With reference to the eighth possible implementation manner of thesecond aspect, in an eleventh possible implementation manner, theresources indicated by the at least one resource set are in an inclusionrelationship, and after the at least one resource set is sorted inascending order of a quantity of indicated resources, resourcesindicated by a current resource set always include all resourcesindicated by a previous resource set.

With reference to the second aspect, or any one of the first to theeleventh possible implementation manners of the second aspect, in atwelfth possible implementation manner, when each resource set of the atleast one resource set indicates that resource elements REs that carrythe initial information are of a same quantity and at same positions inradio frames of each resource set, the sending initial informationaccording to at least one preset resource set includes: mapping theinitial information to the resource elements REs that are of the samequantity and at the same positions in the radio frames of each resourceset, and sending the initial information to the terminal.

A third aspect of the embodiments of the present invention provides aterminal, including: an acquiring unit, configured to acquire initialinformation according to at least one preset resource set, where the atleast one resource set is used to indicate a resource used to acquirethe initial information.

With reference to the third aspect, in a first possible implementationmanner, the terminal further includes: a parsing unit, configured toparse the initial information; and a first determining unit, configuredto: when the parsing unit obtains, by parsing, determining informationthat is of a resource set used by a base station to send the initialinformation and that is included in the initial information, determine,according to the determining information, the resource set used by thebase station to send the initial information.

With reference to the third aspect or the first possible implementationmanner of the third aspect, in a second possible implementation manner,the terminal further includes: a second determining unit, configured todetermine, according to the resource set used to send the initialinformation, a resource used to receive non-initial information, wherethe non-initial information is information that needs to be receivedafter the terminal completes acquiring the initial information; and theacquiring unit is further configured to receive the non-initialinformation by using the resource used to receive the non-initialinformation.

With reference to the second possible implementation manner of the thirdaspect, in a third possible implementation manner, the seconddetermining unit is configured to exclude resources indicated by allresource sets used to send the initial information, and determine aremaining resource obtained after the exclusion as a resource used toreceive the non-initial information.

With reference to the second possible implementation manner of the thirdaspect, in a fourth possible implementation manner, the seconddetermining unit is configured to exclude a resource indicated by theresource set indicated by the determining information, and determine aremaining resource obtained after the exclusion as a resource used toreceive the non-initial information.

With reference to the third or the fourth possible implementation mannerof the third aspect, in a fifth possible implementation manner, theacquiring unit is configured to receive the non-initial information byusing the remaining resource according to a puncturing algorithm or arate matching algorithm.

With reference to any one of the first to the fifth possibleimplementation manners of the third aspect, in a sixth possibleimplementation manner, when each resource set of the at least oneresource set indicates that resource elements REs that carry the initialinformation are of a same quantity and at same positions in radio framesof each resource set, the acquiring unit is further configured toacquire the initial information by using the resource elements REs thatare of the same quantity and at the same positions in the radio framesof each resource set.

A fourth aspect of the embodiments of the present invention provides abase station, including: a sending unit, configured to send initialinformation according to at least one preset resource set, where the atleast one resource set is used to indicate a resource used to send theinitial information.

With reference to the fourth aspect, in a first possible implementationmanner, the base station further includes: determining unit, configuredto determine, according to the resource set used to send the initialinformation, a resource used to send non-initial information, where thenon-initial information is information that needs to be sent after theinitial information is sent; and the sending unit is further configuredto send the non-initial information by using the resource that is usedto send the non-initial information and determined by the determiningunit.

With reference to the first possible implementation manner of the fourthaspect, in a second possible implementation manner, the determining unitis configured to exclude resources indicated by all resource sets usedto send the initial information, and determine a remaining resourceobtained after the exclusion as a resource used to send the non-initialinformation.

With reference to the first possible implementation manner of the fourthaspect, in a third possible implementation manner, the determining unitis configured to exclude a resource indicated by a resource setindicated by determining information, and determine a remaining resourceobtained after the exclusion as a resource used to send the non-initialinformation.

With reference to the second or the third possible implementation mannerof the fourth aspect, in a fourth possible implementation manner, thesending unit is configured to send, according to a puncturing algorithmor a rate matching algorithm, the non-initial information by using theresource used to send the non-initial information.

With reference to the fourth aspect, or any one of the first to thefourth possible implementation manners of the fourth aspect, in a fifthpossible implementation manner, the sending unit is configured to mapthe initial information to resource elements REs that are of a samequantity and at same positions in radio frames of each resource set, andsend the initial information to a terminal.

A fifth aspect of the embodiments of the present invention provides aterminal, including: an input device, an output device, a processor, anda memory, where: the input device is configured to acquire initialinformation according to at least one preset resource set, where the atleast one resource set is used to indicate a resource used to acquirethe initial information.

A sixth aspect of the embodiments of the present invention provides abase station, including: an input device, an output device, a processor,and a memory, where: the output device is configured to send initialinformation according to at least one preset resource set, where the atleast one resource set is used to indicate a resource used to send theinitial information.

A seventh aspect of the embodiments of the present invention provides acommunications system, including: a terminal and a base station, where:the terminal is the terminal described in the foregoing technicalsolutions; and the base station is the base station described in theforegoing technical solutions.

In the embodiments of the present invention, initial information isacquired according to at least one preset resource set, where the atleast one resource set is used to indicate a resource used to acquirethe initial information. Compared with the current technology, where aterminal can receive system information only by using a widest scope ofresources, the information acquiring method provided in an embodiment ofthe present invention enables a terminal to receive the initialinformation by using a preset resource set without a need to detect awidest scope of resources, thereby improving receiving efficiency of theterminal, and further reducing power consumption of the terminal.

BRIEF DESCRIPTION OF THE DRAWINGS

To describe the technical solutions in the embodiments of the presentinvention more clearly, the following briefly introduces theaccompanying drawings required for describing the embodiments.Apparently, the accompanying drawings in the following description showmerely some embodiments of the present invention, and a person skilledin the art may still derive other drawings from these accompanyingdrawings without creative efforts.

FIG. 1 is a schematic diagram of an information acquiring methodaccording to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an information acquiring methodaccording to another embodiment of the present invention;

FIG. 3 is a schematic diagram of a terminal according to an embodimentof the present invention;

FIG. 4 is a schematic diagram of a terminal according to anotherembodiment of the present invention;

FIG. 5 is a schematic diagram of a terminal according to anotherembodiment of the present invention;

FIG. 6 is a schematic diagram of a base station according to anembodiment of the present invention;

FIG. 7 is a schematic diagram of a terminal according to anotherembodiment of the present invention;

FIG. 8 is a schematic diagram of a base station according to anotherembodiment of the present invention; and

FIG. 9 is a schematic diagram of a communications system according to anembodiment of the present invention.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

Embodiments of the present invention provide an information acquiringmethod, which can improve receiving efficiency of a terminal whileensuring that the terminal correctly receives initial information sentby a base station. The embodiments of the present invention furtherprovide a corresponding terminal, base station, and system. The method,terminal, base station, and system are separately described below indetail.

The following describes the technical solutions in the embodiments ofthe present invention with reference to the accompanying drawings in theembodiments of the present invention. Apparently, the describedembodiments are merely some but not all of the embodiments of thepresent invention. All other embodiments obtained by a person skilled inthe art based on the embodiments of the present invention withoutcreative efforts shall fall within the protection scope of the presentinvention.

Referring to FIG. 1, an information acquiring method according to anembodiment of the present invention includes: acquiring initialinformation according to at least one preset resource set, where the atleast one resource set is used to indicate a resource used to acquirethe initial information.

In this embodiment of the present invention, the resource set mayinclude indication information of a resource used to transmitinformation between a base station and a terminal, so that the terminalmay receive the initial information by using a resource indicated by theresource set.

The initial information in this embodiment of the present invention isinformation necessary for accessing a network to perform communication,and the initial information may include but is not limited to at leastone of a master information block (MIB) carried over a physicalbroadcast channel (PBCH), and a system information block (SIB).

In this embodiment of the present invention, initial information isreceived according to at least one preset resource set, where the atleast one resource set is used to indicate a resource used to receivethe initial information. Compared with the current technology, where aterminal can receive system information only by using a widest scope ofresources, the information acquiring method provided in this embodimentof the present invention enables a terminal to acquire, according to arequirement of the terminal, initial information by using a resourceindicated by a corresponding resource set, thereby improving a resourceutilization rate of the terminal.

Referring to FIG. 1, in an optional embodiment of the informationacquiring method according to an embodiment of the present invention, aprocess of the receiving initial information according to at least onepreset resource set may include the following.

101. Acquire the at least one preset resource set, where the at leastone resource set is used to indicate a resource used to acquire theinitial information.

A process of the acquiring the at least one resource set may be readingor searching for the at least one preset resource set.

102. Determine, according to the at least one resource set, the resourceused to acquire the initial information.

A resource set may include indication information of a correspondingresource. For example, when there are two resource sets, a resource set1 includes identifiers of subframes 1 and 2 of a first radio frame, anda resource set 2 includes the identifiers of the subframes 1 and 2 ofthe first radio frame and identifiers of subframes 1 and 2 of a secondradio frame. In this case, it can be determined that the resources usedto receive the initial information are the subframes 1 and 2 of thefirst radio frame and the subframes 1 and 2 of the second radio frame.

Certainly, only an example is illustrated here, and actually, there maybe multiple resource sets, and there may also be multiple types ofindication information of resources included in the resource sets. Nospecific limitation is imposed in this embodiment of the presentinvention.

103. Acquire the initial information by using the determined resource.

In this embodiment of the present invention, the terminal may receivethe initial information by using the resource indicated by the resourceset, and does not need to receive the initial information by using awidest scope of resources, thereby improving a resource utilization rateof the terminal.

Optionally, on the basis of the foregoing embodiment, in anotheroptional embodiment of the information acquiring method according to anembodiment of the present invention, the method may further include:parsing the initial information; and when determining information of aresource set used by a base station to send the initial information isincluded in the initial information, determining, according to thedetermining information, the resource set used by the base station tosend the initial information.

In this embodiment of the present invention, when sending the initialinformation, the base station may include, in the initial information,determining information of a resource set used by the base station tosend the initial information, where the determining information is usedto indicate resource sets used by the base station to send the initialinformation, for example, the determining information may indicate aresource set 1, a resource set 2, and the like.

In this way, after obtaining, by parsing, the determining information,the terminal may determine, according to the determining information,the resource sets used by the base station to send the initialinformation.

Optionally, on the basis of the foregoing embodiments, in anotheroptional embodiment of the information acquiring method according to anembodiment of the present invention, the method may further include:determining, according to the resource set used to send the initialinformation, a resource used to receive non-initial information, wherethe non-initial information is information that needs to be receivedafter a terminal completes acquiring the initial information; andreceiving the non-initial information by using the resource used toreceive the non-initial information.

The non-initial information in this embodiment of the present inventionmay include but is not limited to at least one of information carriedover a physical downlink control channel (PDCCH), information carriedover an enhanced physical downlink control channel (EPDCCH), informationcarried over a physical downlink shared channel (PDSCH), and a channelstate information-reference signal (CSI-RS).

A resource used to send the initial information can be determinedaccording to the resource set used to send the initial information. Aresource used to receive the non-initial information can be determinedby excluding, from all resources, the resource used by the initialinformation. The non-initial information is received by using thedetermined resource used to receive the non-initial information.

In the current technology, coverage enhancement capabilities of basestations are different, or coverage enhancement requirements that thebase stations are required to support are different. Therefore,intensities of system information sent by base stations that providedifferent coverage enhancement are different. For example, quantities oftimes initial information is repeatedly sent are different, andtherefore when receiving the initial information, a terminal cannot makesure how many times the base stations have repeatedly sent the systeminformation. In this case, when the terminal subsequently receivesnon-initial information, because the initial information and thenon-initial information may appear at a same frequency-domain resourceposition, and the terminal cannot determine how many time-frequencyresources are used by the base stations, or which time-frequencyresources are used to send the system information, the terminal cannotcorrectly receive the non-initial information sent by the base stations.

However, the method according to this embodiment of the presentinvention may determine a resource used by a base station to send anon-broadcast signal, so that the terminal can correctly receive thenon-broadcast signal, thereby ensuring normal communication between theterminal and the base station.

Optionally, on the basis of the foregoing embodiments, in anotheroptional embodiment of the information acquiring method according to anembodiment of the present invention, the determining, according to theresource set used to send the initial information, a resource used toreceive non-initial information may include: excluding resourcesindicated by all resource sets used to send the initial information, anddetermining a remaining resource obtained after the exclusion as aresource used to receive the non-initial information.

In this embodiment of the present invention, when no determininginformation exists in the initial information, the terminal may excluderesources indicated by all resource sets used to send the initialinformation, and determine a remaining resource obtained after theexclusion as a resource used to receive the non-initial information.

Optionally, on the basis of the foregoing embodiments, in anotheroptional embodiment of the information acquiring method according to anembodiment of the present invention, the determining, according to theresource set used to send the initial information, a resource used toreceive non-initial information may include: excluding a resourceindicated by the resource set indicated by the determining information,and determining a remaining resource obtained after the exclusion as aresource used to receive the non-initial information.

In this embodiment of the present invention, when determininginformation exists in the initial information, the terminal maydetermine, directly according to a resource indicated by a resource setindicated by the determining information, a remaining resource obtainedafter the exclusion as a resource used to receive the non-initialinformation.

Optionally, on the basis of the foregoing embodiments, in anotheroptional embodiment of the information acquiring method according to anembodiment of the present invention, the receiving the non-initialinformation by using the resource used to receive the non-initialinformation may include: receiving the non-initial information by usingthe remaining resource according to a puncturing algorithm or a ratematching algorithm.

Both the puncturing algorithm and the rate matching algorithm arecommonly used methods in the field, which are not described in detailherein.

Optionally, on the basis of the foregoing embodiments, in anotheroptional embodiment of the information acquiring method according to anembodiment of the present invention, each resource set of the at leastone resource set includes indication information of at least one of atime-domain resource and a frequency-domain resource that carry theinitial information.

A resource in this embodiment of the present invention may be atime-domain resource and a frequency-domain resource, and the indicationinformation of a resource included in a resource set may be indicationinformation of at least one of a time-domain resource and afrequency-domain resource.

Optionally, on the basis of the foregoing embodiments, in anotheroptional embodiment of the information acquiring method according to anembodiment of the present invention, each resource set includesindication information of at least one of a time-domain resource and afrequency-domain resource that are of a preset quantity and at a presetposition, and resources indicated by the at least one resource set donot overlap, or partially overlap.

In this embodiment of the present invention, a quantity of resourcesincluded in each resource set may be preset. For example, a resource set1 includes identifiers of two radio frames, where the identifier of afirst radio frame corresponds to identifiers of subframes 1 and 2, andthe identifier of a second radio frame corresponds to identifiers ofsubframes 3 and 4; and a resource set 2 includes an identifier of oneradio frame, where the identifier of the radio frame corresponds toidentifiers of subframes 5, 6, and 7.

Optionally, on the basis of the foregoing embodiments, in anotheroptional embodiment of the information acquiring method according to anembodiment of the present invention, each resource set includesindication information of at least one of a time-domain resource and afrequency-domain resource that are of a same quantity and at a presetposition, and resources indicated by the at least one resource set donot overlap, or partially overlap.

In this embodiment of the present invention, resources included in eachresource set are of a same quantity. For example, a resource set 1includes identifiers of two radio frames, where the identifier of afirst radio frame corresponds to identifiers of subframes 1 and 2, andthe identifier of a second radio frame corresponds to identifiers ofsubframes 3 and 4; and a resource set 2 includes identifiers of tworadio frames, where the identifier of a first radio frame corresponds toidentifiers of subframes 5 and 6, and the identifier of a second radioframe corresponds to identifiers of subframes 7 and 8.

Optionally, on the basis of the foregoing embodiments, in anotheroptional embodiment of the information acquiring method according to anembodiment of the present invention, the resources indicated by the atleast one resource set are in an inclusion relationship, and after theat least one resource set is sorted in ascending order of a quantity ofindicated resources, resources indicated by a current resource setalways include all resources indicated by a previous resource set.

In this embodiment of the present invention, when there are fiveresource sets Rset1, Rset2, Rset3, Rset4, and Rset5, and an order isstill Rset1, Rset2, Rset3, Rset4, and Rset5 after the resource sets aresorted in ascending order of a quantity of resources indicated by eachresource set, resources indicated by Rset2 include all resourcesindicated by Rset1, resources indicated by Rset3 include all theresources indicated by Rset2, resources indicated by Rset4 include allthe resources indicated by Rset3, and resources indicated by Rset5include all the resources indicated by Rset4.

Optionally, on the basis of the foregoing embodiments, in anotheroptional embodiment of the information acquiring method according to anembodiment of the present invention, when each resource set of the atleast one resource set indicates that resource elements (RE) that carrythe initial information are of a same quantity and at same positions inradio frames of each resource set, the acquiring initial informationaccording to at least one preset resource set may include: acquiring theinitial information by using the resource elements REs that are of thesame quantity and at the same positions in the radio frames of eachresource set.

In this embodiment of the present invention, a resource element may be asubframe.

Being of a same quantity and at same positions in radio frames of eachresource set may be understood as: resources indicated by a resource set1 include a first subframe and a second subframe of a first radio frame,and if resource sets are in an inclusion relationship, resourcesindicated by a resource set 2 include not only the resources indicatedby the resource set 1, but also a first subframe and a second subframeof a second radio frame. Here, resources included in both the firstradio frame and the second radio frame are the first subframe and thesecond subframe.

On a base station side, another embodiment of the information acquiringmethod according to an embodiment of the present invention includes:sending initial information according to at least one preset resourceset, where the at least one resource set is used to indicate a resourceused to send the initial information.

In this embodiment of the present invention, the resource set mayinclude indication information of a resource used to transmitinformation between a base station and a terminal, so that the terminalmay receive the initial information by using a resource indicated by theresource set.

The initial information in this embodiment of the present invention isinformation necessary for accessing a network to perform communication,and the initial information may include but is not limited to at leastone of a master information block (MIB) carried over a physicalbroadcast channel (PBCH), and a system information block (SIB).

In this embodiment of the present invention, initial information is sentaccording to at least one preset resource set, where the at least oneresource set is used to indicate a resource used to send the initialinformation. Compared with the current technology, where a base stationcan send system information only by using a widest scope of resources,the information acquiring method provided in this embodiment of thepresent invention enables a base station to send, according to arequirement of the terminal, initial information by using a resourceindicated by a corresponding resource set, thereby improving a resourceutilization rate of the terminal.

Referring to FIG. 2, in another optional embodiment of the informationacquiring method according to an embodiment of the present invention, aprocess of the sending initial information according to at least onepreset resource set may include the following.

201. Acquire the at least one preset resource set, where the at leastone resource set is used to indicate a resource used to send the initialinformation.

A process of the acquiring the at least one resource set may be readingor searching for the at least one preset resource set.

202. Determine, according to the at least one resource set, the resourceused to send the initial information.

A resource set may include indication information of a correspondingresource. For example, when there are two resource sets, a resource set1 includes identifiers of subframes 1 and 2 of a first radio frame, anda resource set 2 includes the identifiers of the subframes 1 and 2 ofthe first radio frame and identifiers of subframes 1 and 2 of a secondradio frame. In this case, it can be determined that the resources usedto send the initial information are the subframes 1 and 2 of the firstradio frame and the subframes 1 and 2 of the second radio frame.

Certainly, only an example is illustrated here, and actually, there maybe multiple resource sets, and there may also be multiple types ofindication information of resources included in the resource sets. Nospecific limitation is imposed in this embodiment of the presentinvention.

203. Send the initial information by using the determined resource.

In this embodiment of the present invention, the base station may send,according to a requirement of a terminal, the initial information byusing the resource indicated by the corresponding resource set, therebyimproving a resource utilization rate of the terminal.

Optionally, on the basis of the foregoing embodiment of the base stationside, in another optional embodiment of the information acquiring methodaccording to an embodiment of the present invention, determininginformation of a resource set used to send the initial information isincluded in the initial information, so that a terminal determines,according to the determining information, a resource set used by a basestation to send the initial information.

In this embodiment of the present invention, when sending the initialinformation, the base station may include, in the initial information,determining information of a resource set used by the base station tosend the initial information, where the determining information is usedto indicate resource sets used by the base station to send the initialinformation, for example, the determining information may indicate aresource set 1, a resource set 2, and the like.

In this way, after obtaining, by parsing, the determining information,the terminal may determine, according to the determining information,the resource sets used by the base station to send the initialinformation.

Optionally, on the basis of the foregoing embodiment of the base stationside, in another optional embodiment of the information acquiring methodaccording to an embodiment of the present invention, the method mayfurther include: determining, according to the resource set used to sendthe initial information, a resource used to send non-initialinformation, where the non-initial information is information that needsto be sent after the initial information is sent; and sending thenon-initial information by using the resource used to send thenon-initial information.

The non-initial information in this embodiment of the present inventionmay include but is not limited to at least one of information carriedover a physical downlink control channel (PDCCH), information carriedover an enhanced physical downlink control channel (EPDCCH), informationcarried over a physical downlink shared channel (PDSCH), and a channelstate information-reference signal (CSI-RS).

According to the resource set used to send the initial information, aresource used to send the initial information can be determined. Aresource used to send the non-initial information can be determined byexcluding, from all resources, the resource used by the initialinformation, and the non-initial information is sent by using theresource used to send the non-initial information.

Optionally, on the basis of the foregoing embodiment of the base stationside, in another optional embodiment of the information acquiring methodaccording to an embodiment of the present invention, the determining,according to the resource set used to send the initial information, aresource used to send non-initial information may include: excludingresources indicated by all resource sets used to send the initialinformation, and determining a remaining resource obtained after theexclusion as a resource used to send the non-initial information.

In this embodiment of the present invention, when no determininginformation exists in the initial information, the base station mayexclude resources indicated by all resource sets used to send theinitial information, and determine a remaining resource obtained afterthe exclusion as a resource used to send the non-initial information.

Optionally, on the basis of the foregoing embodiment of the base stationside, in another optional embodiment of the information acquiring methodaccording to an embodiment of the present invention, the determining,according to the resource set used to send the initial information, aresource used to send non-initial information may include: excluding aresource indicated by the resource set indicated by the determininginformation, and determining a remaining resource obtained after theexclusion as a resource used to send the non-initial information.

In this embodiment of the present invention, when determininginformation exists in the initial information, the terminal maydetermine, directly according to a resource indicated by a resource setindicated by the determining information, a remaining resource obtainedafter the exclusion as a resource used to send the non-initialinformation.

Optionally, on the basis of the foregoing embodiment of the base stationside, in another optional embodiment of the information acquiring methodaccording to an embodiment of the present invention, the sending thenon-initial information by using the resource used to send thenon-initial information may include: sending, according to a puncturingalgorithm or a rate matching algorithm, the non-initial information byusing the resource used to send the non-initial information.

Both the puncturing algorithm and the rate matching algorithm arecommonly used methods in the field, which are not described in detailherein.

Optionally, on the basis of the foregoing embodiment of the base stationside, in another optional embodiment of the information acquiring methodaccording to an embodiment of the present invention, each resource setof the at least one resource set includes indication information of atleast one of a time-domain resource and a frequency-domain resource thatcarry the initial information.

A resource in this embodiment of the present invention may be atime-domain resource and a frequency-domain resource, and the indicationinformation of a resource included in a resource set may be indicationinformation of at least one of a time-domain resource and afrequency-domain resource.

Optionally, on the basis of the foregoing embodiment of the base stationside, in another optional embodiment of the information acquiring methodaccording to an embodiment of the present invention, each resource setincludes indication information of at least one of a time-domainresource and a frequency-domain resource that are of a preset quantityand at a preset position, and resources indicated by the at least oneresource set do not overlap, or partially overlap.

In this embodiment of the present invention, a quantity of resourcesincluded in each resource set may be preset. For example, a resource set1 includes identifiers of two radio frames, where the identifier of afirst radio frame corresponds to identifiers of subframes 1 and 2, andthe identifier of a second radio frame corresponds to identifiers ofsubframes 3 and 4; and a resource set 2 includes an identifier of oneradio frame, where the identifier of the radio frame corresponds toidentifiers of subframes 5, 6, and 7.

Optionally, on the basis of the foregoing embodiment of the base stationside, in another optional embodiment of the information acquiring methodaccording to an embodiment of the present invention, each resource setincludes indication information of at least one of a time-domainresource and a frequency-domain resource that are of a same quantity andat a preset position, and resources indicated by the at least oneresource set do not overlap, or partially overlap.

In this embodiment of the present invention, resources included in eachresource set are of a same quantity. For example, a resource set 1includes identifiers of two radio frames, where the identifier of afirst radio frame corresponds to identifiers of subframes 1 and 2, andthe identifier of a second radio frame corresponds to identifiers ofsubframes 3 and 4; and a resource set 2 includes identifiers of tworadio frames, where the identifier of a first radio frame corresponds toidentifiers of subframes 5 and 6, and the identifier of a second radioframe corresponds to identifiers of subframes 7 and 8.

Optionally, on the basis of the foregoing embodiment of the base stationside, in another optional embodiment of the information acquiring methodaccording to an embodiment of the present invention, the resourcesindicated by the at least one resource set are in an inclusionrelationship, and after the at least one resource set is sorted inascending order of a quantity of indicated resources, resourcesindicated by a current resource set always include all resourcesindicated by a previous resource set.

In this embodiment of the present invention, when there are fiveresource sets Rset1, Rset2, Rset3, Rset4, and Rset5, and an order isstill Rset1, Rset2, Rset3, Rset4, and Rset5 after the resource sets aresorted in ascending order of a quantity of resources indicated by eachresource set, resources indicated by Rset2 include all resourcesindicated by Rset1, resources indicated by Rset3 include all theresources indicated by Rset2, resources indicated by Rset4 include allthe resources indicated by Rset3, and resources indicated by Rset5include all the resources indicated by Rset4.

Optionally, on the basis of the foregoing embodiment of the base stationside, in another optional embodiment of the information acquiring methodaccording to an embodiment of the present invention, when each resourceset of the at least one resource set indicates that resource elements(REs) that carry the initial information are of a same quantity and atsame positions in radio frames of each resource set, the sending initialinformation according to at least one preset resource set includes:mapping the initial information to the resource elements REs that are ofthe same quantity and at the same positions in the radio frames of eachresource set, and sending the initial information to the terminal.

In this embodiment of the present invention, a resource element may be asubframe.

Being of a same quantity and at same positions in radio frames of eachresource set may be understood as: resources indicated by a resource set1 include a first subframe and a second subframe of a first radio frame,and if resource sets are in an inclusion relationship, resourcesindicated by a resource set 2 include not only the resources indicatedby the resource set 1, but also a first subframe and a second subframeof a second radio frame. Here, resources included in both the firstradio frame and the second radio frame are the first subframe and thesecond subframe.

To facilitate understanding, the following uses a specific applicationscenario as an example to describe a process of information acquiring inthis embodiment of the present invention.

A preset resource set in the base station and the terminal may becorresponding to a coverage enhancement level of the base station. Forexample, when coverage enhancement capabilities of the base stationindicated by five coverage enhancement levels, that is, CIlevel1,CIlevel2, CIlevel3, CIlevel4, and CIlevel5, of the base station arerespectively 0 dB, 5 dB, 10 dB, and 15 dB, the five levels may berespectively corresponding to the following resource sets: Rset1, Rset2,Rset3, Rset4, and Rset5, where resources indicated by Rset1, Rset2,Rset3, Rset4, and Rset5 may overlap, may not overlap, or may be in aninclusion relationship.

In this embodiment of the present invention, an example in whichresources are in an inclusion relationship is used to describe acorrespondence between a coverage enhancement level supported by a basestation and a resource set.

The correspondence between the coverage enhancement level supported bythe base station and the resource set may be:

Set 0: a resource that the base station needs to occupy for sendinginitial information when coverage enhancement is not required, that is,the resource used to send the initial information when coverageenhancement of the base station is 0 dB;

Set 1: An extra resource is added on the basis of the resources in theforegoing Set0, such as resources in subframes 0, 5, 1, and 6, which iscorresponding to coverage enhancement of 5 dB;

Set 2: An extra resource is added on the basis of the resources in theforegoing Set1, such as resources in subframes 2 and 7, which iscorresponding to coverage enhancement of 10 dB;

Set 3: An extra resource is added on the basis of the resources in theforegoing Set2, such as resources in subframes 3, 4, 8, and 9, which iscorresponding to coverage enhancement of 15 dB.

The correspondence between the coverage enhancement level supported bythe base station and the resource set may be:

Set 0: a resource that the base station needs to occupy for sendinginitial information when coverage enhancement is not required, that is,the resource used to send the initial information when coverageenhancement of the base station is 0 dB;

Set 1: all available resources of a first radio frame, which iscorresponding to coverage enhancement of 5 dB;

Set 2: all available resources of the first two radio frames, which iscorresponding to coverage enhancement of 10 dB;

Set 3: all available resources of the first four radio frames, which iscorresponding to coverage enhancement of 15 dB.

The correspondence between the coverage enhancement level supported bythe base station and the resource set may be:

Set 0: a resource that the base station needs to occupy for sendinginitial information when coverage enhancement is not required, that is,the resource used to send the initial information when coverageenhancement of the base station is 0 dB;

Set 1: some or all of available resources in a radio frame i (i=0, 1, 2,or 3), which is corresponding to coverage enhancement of 5 dB;

Set 2: an extra resource added on the basis of the resources in theforegoing Set1, where the extra resource refers to some or all ofremaining resources except resources corresponding to Set1 in the radioframe i (i=0, 1, 2, or 3), which is corresponding to coverageenhancement of 10 dB;

Set 3: an extra resource added on the basis of the resources in theforegoing Set2, where the extra resource refers to some or all ofremaining resources except resources corresponding to Set2 in the radioframe i (i=0, 1, 2, or 3), which is corresponding to coverageenhancement of 15 dB.

The foregoing provides only several specific correspondences between thecoverage enhancement levels of the base station and the resource sets,which is not specifically limited in this embodiment of the presentinvention. Another resource set classification method may be used, andanother coverage enhancement level may also exist.

A terminal according to an embodiment of the present invention includes:a receiving unit, configured to acquire initial information according toat least one preset resource set, where the at least one resource set isused to indicate a resource used to acquire the initial information.

Referring to FIG. 3, another embodiment of the terminal according to theembodiment of the present invention includes: an acquiring unit 301,configured to acquire at least one preset resource set, where the atleast one resource set is used to indicate a resource used to acquirethe initial information; a determining unit 302, configured todetermine, according to the at least one resource set acquired by theacquiring unit 301, the resource used to acquire the initialinformation; and a receiving unit 303, configured to receive the initialinformation by using the resource determined by the determining unit302.

In this embodiment of the present invention, an acquiring unit 301acquires at least one preset resource set, where the at least oneresource set is used to indicate a resource used to receive initialinformation; a determining unit 302 determines, according to the atleast one resource set acquired by the acquiring unit 301, the resourceused to receive the initial information; and a receiving unit 303receives the initial information by using the resource determined by thedetermining unit 302. Compared with the current technology, where aterminal can receive system information only by using a widest scope ofresources, the terminal provided in the embodiment of the presentinvention may receive the initial information by using a preset resourceset without a need to detect a widest scope of resources, therebyimproving receiving efficiency of the terminal, and further reducingpower consumption of the terminal.

Optionally, referring to FIG. 4, on the basis of the foregoing terminalembodiment, in another embodiment of the terminal according to theembodiment of the present invention, the terminal 30 further includes: aparsing unit 304, configured to parse the initial information; and afirst determining unit 305, configured to: when the parsing unit 304obtains, by parsing, determining information that is of a resource setused by a base station to send the initial information and that isincluded in the initial information, determine, according to thedetermining information, the resource set used by the base station tosend the initial information.

Optionally, referring to FIG. 5, on the basis of the foregoing terminalembodiment, in another embodiment of the terminal according to theembodiment of the present invention, the terminal 30 further includes: asecond determining unit 306, configured to determine, according to theresource set used to send the initial information, a resource used toreceive non-initial information, where the non-initial information isinformation that needs to be received after the terminal completesacquiring the initial information; and the receiving unit 303 is furtherconfigured to receive the non-initial information by using the resourceused to receive the non-initial information.

Optionally, on the basis of the embodiment corresponding to FIG. 5, inanother embodiment of the terminal according to the embodiment of thepresent invention, the second determining unit 306 is configured toexclude resources indicated by all resource sets used to send theinitial information, and determine a remaining resource obtained afterthe exclusion as a resource used to receive the non-initial information.

Optionally, on the basis of the embodiment corresponding to FIG. 5, inanother embodiment of the terminal according to the embodiment of thepresent invention, the second determining unit 306 is configured toexclude a resource indicated by the resource set indicated by thedetermining information, and determine a remaining resource obtainedafter the exclusion as a resource used to receive the non-initialinformation.

Optionally, on the basis of the embodiment corresponding to FIG. 5, inanother embodiment of the terminal according to the embodiment of thepresent invention, the receiving unit 303 is configured to receive thenon-initial information by using the remaining resource according to apuncturing algorithm or a rate matching algorithm.

Optionally, on the basis of the embodiment corresponding to FIG. 5, inanother embodiment of the terminal according to the embodiment of thepresent invention, the receiving unit 303 is further configured toreceive the initial information from resource elements REs that are of asame quantity and at same positions in radio frames of each resourceset.

A base station according to an embodiment of the present inventionincludes: a sending unit, configured to send initial informationaccording to at least one preset resource set, where the at least oneresource set is used to indicate a resource used to send the initialinformation.

Referring to FIG. 6, another embodiment of the base station according tothe embodiment of the present invention includes: an acquiring unit 401,configured to acquire at least one preset resource set, where the atleast one resource set is used to indicate a resource used to send theinitial information; a determining unit 402, configured to determine,according to the at least one resource set acquired by the acquiringunit 401, the resource used to send the initial information; and asending unit 403, configured to send the initial information by usingthe resource determined by the determining unit 402.

In this embodiment of the present invention, an acquiring unit 401acquires at least one preset resource set, where the at least oneresource set is used to indicate a resource used to send initialinformation; a determining unit 402 determines, according to the atleast one resource set acquired by the acquiring unit 401, the resourceused to send the initial information; and a sending unit 403 sends theinitial information by using the resource determined by the determiningunit. Compared with the current technology, where a base station cansend system information only by using a widest scope of resources, thebase station provided in the embodiment of the present invention maysend, according to a requirement of the terminal, initial information byusing a resource indicated by a corresponding resource set, therebyimproving a resource utilization rate of the terminal.

On the basis of the foregoing embodiment corresponding to FIG. 6, inanother embodiment of the base station according to the embodiment ofthe present invention, the determining unit 402 is configured todetermine, according to the resource set used to send the initialinformation, a resource used to send non-initial information, where thenon-initial information is information that needs to be sent after theinitial information is sent; and the sending unit 403 is furtherconfigured to send the non-initial information by using the resourcethat is used to send the non-initial information and determined by thedetermining unit 402.

On the basis of the foregoing embodiments, in another embodiment of thebase station according to the embodiment of the present invention, thedetermining unit 402 is configured to exclude resources indicated by allresource sets used to send the initial information, and determine aremaining resource obtained after the exclusion as a resource used tosend the non-initial information.

On the basis of the foregoing embodiments, in another embodiment of thebase station according to the embodiment of the present invention, thedetermining unit 402 is configured to exclude a resource indicated by aresource set indicated by determining information, and determine aremaining resource obtained after the exclusion as a resource used tosend the non-initial information.

On the basis of the foregoing embodiments, in another embodiment of thebase station according to the embodiment of the present invention, thesending unit 403 is configured to send, according to a puncturingalgorithm or a rate matching algorithm, the non-initial information byusing the resource used to send the non-initial information.

On the basis of the foregoing embodiments, in another embodiment of thebase station according to the embodiment of the present invention, thesending unit 403 is configured to map the initial information toresource elements (REs) that are of a same quantity and at samepositions in radio frames of each resource set, and send the initialinformation to a terminal.

An embodiment of the present invention further provides a computerstorage medium, where the computer storage medium stores a program. Whenthe program runs, some or all of the steps of the foregoing informationacquiring method on the terminal side are performed.

An embodiment of the present invention further provides a computerstorage medium, where the computer storage medium stores a program. Whenthe program runs, some or all of the steps of the foregoing informationacquiring method on the base station side are performed.

FIG. 7 is a schematic diagram of a structure of a terminal 30 accordingto an embodiment of the present invention. The terminal 30 may includean input device 310, an output device 320, a processor 330, and a memory340.

The memory 340 may include a read-only memory and a random accessmemory, and provide an instruction and data for the processor 330. Apart of the memory 340 may further include a non-volatile random accessmemory (NVRAM).

The memory 340 stores the following elements, an executable module or adata structure, or a subset thereof, or an extended set thereof: anoperating instruction: including various operating instructions, whichare used to implement various operations; and an operating system:including various system programs, which are used to implement variousbasic services and process a hardware-based task.

In this embodiment of the present invention, the processor 330 performsthe following operation by invoking an operating instruction stored inthe memory 340 (the operating instruction may be stored in the operatingsystem): receiving, according to at least one preset resource set,initial information by using the input device 310, where the at leastone resource set is used to indicate a resource used to receive theinitial information.

Optionally, the processor 330 acquires the at least one preset resourceset, where the at least one resource set is used to indicate theresource used to receive the initial information; determines, accordingto the at least one resource set, the resource used to receive theinitial information; and uses the input device 310 to receive theinitial information by using the determined resource.

In this embodiment of the present invention, a terminal may receive theinitial information by using a preset resource set without a need todetect a widest scope of resources, thereby improving receivingefficiency of the terminal, and further reducing power consumption ofthe terminal.

The processor 330 controls an operation of the terminal 30, and theprocessor 330 may further be referred to as a CPU (Central ProcessingUnit). The memory 340 may include a read-only memory and a random accessmemory, and provide an instruction and data for the processor 330. Apart of the memory 340 may further include a non-volatile random accessmemory (NVRAM). In a specific application, all components of theterminal 30 are coupled together by using a bus system 350, where thebus system 350 may further include a power bus, a control bus, a statusinformation bus, and the like in addition to a data bus. However, forclarity of description, various buses are marked as the bus system 350in the figure.

The methods disclosed in the foregoing embodiment of the presentinvention may be applied to the processor 330 or implemented by theprocessor 330. The processor 330 may be an integrated circuit chip andhas an information processing capability. In an implementation process,the steps of the foregoing methods may be completed by using anintegrated logic circuit of hardware in the processor 330 or aninstruction in a form of software. The foregoing processor 330 may be ageneral purpose processor, a digital signal processor (DSP), anapplication-specific integrated circuit (ASIC), a field programmablegate array (FPGA) or another programmable logical device, discrete gateor transistor logical device, or a discrete hardware component, whichmay implement or execute the methods, the steps, and the logical blockdiagrams disclosed in the embodiments of the present invention. Thegeneral purpose processor may be a microprocessor, or the processor maybe any conventional processor and the like. Steps of the methodsdisclosed with reference to the embodiments of the present invention maybe directly executed and completed by means of a hardware decodingprocessor, or may be executed and completed by using a combination ofhardware and software modules in a decoding processor. The softwaremodule may be located in a mature storage medium in the field, such as arandom access memory, a flash memory, a read-only memory, a programmableread-only memory, an electrically-erasable programmable memory, or aregister. The storage medium is located in the memory 340. The processor330 reads information from the memory 340, and completes the steps ofthe foregoing methods in combination with hardware of the processor 330.

Optionally, the processor 330 may further parse the initial information;and when determining information of a resource set used to send theinitial information is included in the initial information, determine,according to the determining information, the resource set used by abase station to send the initial information.

Optionally, the processor 330 may further determine, according to theresource set used to send the initial information, a resource used toreceive non-initial information, where the non-initial information isinformation that needs to be received after a terminal completesacquiring the initial information; and the input device 310 may furtherreceive the non-initial information by using the resource used toreceive the non-initial information.

Optionally, the processor 330 may specifically exclude resourcesindicated by all resource sets used to send the initial information, anddetermine a remaining resource obtained after the exclusion as aresource used to receive the non-initial information.

Optionally, the processor 330 may specifically exclude a resourceindicated by the resource set indicated by the determining information,and determine a remaining resource obtained after the exclusion as aresource used to receive the non-initial information.

Optionally, the input device 310 may further specifically receive thenon-initial information by using the remaining resource according to apuncturing algorithm or a rate matching algorithm.

Optionally, the initial information is information necessary foraccessing a network to perform communication; and the initialinformation includes at least one of a master information block (MIB)carried over a physical broadcast channel (PBCH), and a systeminformation block (SIB).

Optionally, the non-initial information includes at least one ofinformation carried over a physical downlink control channel (PDCCH),information carried over an enhanced physical downlink control channel(EPDCCH), information carried over a physical downlink shared channel(PDSCH), and a channel state information-reference signal (CSI-RS).

Optionally, each resource set includes indication information of atleast one of a time-domain resource and a frequency-domain resource thatare of a preset quantity and at a preset position, and resourcesindicated by the at least one resource set do not overlap, or partiallyoverlap.

Optionally, each resource set includes indication information of atleast one of a time-domain resource and a frequency-domain resource thatare of a same quantity and at a preset position, and resources indicatedby the at least one resource set do not overlap, or partially overlap.

Optionally, the resources indicated by the at least one resource set arein an inclusion relationship, and after the at least one resource set issorted in ascending order of a quantity of indicated resources,resources indicated by a current resource set always include allresources indicated by a previous resource set.

Optionally, when each resource set of the at least one resource setindicates that resource elements REs that carry the initial informationare of a same quantity and at same positions in radio frames of eachresource set, the input device 310 may further receive the initialinformation by using the resource elements REs that are of the samequantity and at the same positions in the radio frames of each resourceset.

FIG. 8 is a schematic diagram of a structure of a base station 40according to an embodiment of the present invention. The base station 40may include an input device 410, an output device 420, a processor 430,and a memory 440.

The memory 440 may include a read-only memory and a random accessmemory, and provide an instruction and data for the processor 430. Apart of the memory 440 may further include a non-volatile random accessmemory (NVRAM).

The memory 440 stores the following elements, an executable module or adata structure, or a subset thereof, or an extended set thereof: anoperating instruction: including various operating instructions, whichare used to implement various operations; and an operating system:including various system programs, which are used to implement variousbasic services and process a hardware-based task.

In this embodiment of the present invention, the processor 430 performsthe following operation by invoking an operating instruction stored inthe memory 440 (the operating instruction may be stored in the operatingsystem): sending, according to at least one preset resource set, initialinformation by using the output device 420, where the at least oneresource set is used to indicate a resource used to send the initialinformation.

Optionally, the processor 430 acquires the at least one preset resourceset, where the at least one resource set is used to indicate theresource used to receive the initial information; determines, accordingto the at least one resource set, the resource used to send the initialinformation; and uses the output device 420 to send the initialinformation by using the determined resource.

In this embodiment of the present invention, the base station may sendthe initial information by using the resource indicated by the resourceset without a need to send the initial information by using a widestscope of resources, thereby improving a resource utilization rate of aterminal.

The processor 430 controls an operation of the base station 40, and theprocessor 430 may further be referred to as a CPU (Central ProcessingUnit). The memory 440 may include a read-only memory and a random accessmemory, and provide an instruction and data for the processor 430. Apart of the memory 440 may further include a non-volatile random accessmemory (NVRAM). In a specific application, all components of the basestation 40 are coupled together by using a bus system 450, where the bussystem 450 may further include a power bus, a control bus, a statusinformation bus, and the like in addition to a data bus. However, forclarity of description, various buses are marked as the bus system 450in the figure.

The methods disclosed in the foregoing embodiment of the presentinvention may be applied to the processor 430 or implemented by theprocessor 430. The processor 430 may be an integrated circuit chip andhas an information processing capability. In an implementation process,the steps of the foregoing methods may be completed by using anintegrated logic circuit of hardware in the processor 430 or aninstruction in a form of software. The foregoing processor 430 may be ageneral purpose processor, a digital signal processor (DSP), anapplication-specific integrated circuit (ASIC), a field programmablegate array (FPGA) or another programmable logical device, discrete gateor transistor logical device, or a discrete hardware component, whichmay implement or execute the methods, the steps, and the logical blockdiagrams disclosed in the embodiments of the present invention. Thegeneral purpose processor may be a microprocessor, or the processor maybe any conventional processor and the like. Steps of the methodsdisclosed with reference to the embodiments of the present invention maybe directly executed and completed by means of a hardware decodingprocessor, or may be executed and completed by using a combination ofhardware and software modules in a decoding processor. The softwaremodule may be located in a mature storage medium in the field, such as arandom access memory, a flash memory, a read-only memory, a programmableread-only memory, an electrically-erasable programmable memory, or aregister. The storage medium is located in the memory 440. The processor430 reads information from the memory 440, and completes the steps ofthe foregoing methods in combination with hardware of the processor 430.

Optionally, determining information of a resource set used to send theinitial information is included in the initial information, so that theterminal determines, according to the determining information, theresource set used by the base station to send the initial information.

Optionally, the processor 430 may further determine, according to theresource set used to send the initial information, a resource used tosend non-initial information, where the non-initial information isinformation that needs to be sent after the initial information is sent;and the output device 420 may further send the non-initial informationby using the resource used to send the non-initial information.

Optionally, the processor 430 may specifically exclude resourcesindicated by all resource sets used to send the initial information, anddetermine a remaining resource obtained after the exclusion as aresource used to send the non-initial information.

Optionally, the processor 430 may specifically exclude a resourceindicated by the resource set indicated by the determining information,and determine a remaining resource obtained after the exclusion as aresource used to send the non-initial information.

Optionally, the input device 410 may further specifically send,according to a puncturing algorithm or a rate matching algorithm, thenon-initial information by using the resource used to send thenon-initial information.

Optionally, the initial information is information necessary foraccessing a network to perform communication; and the initialinformation includes at least one of a master information block (MIB)carried over a physical broadcast channel (PBCH), and a systeminformation block (SIB).

Optionally, the non-initial information includes at least one ofinformation carried over a physical downlink control channel (PDCCH),information carried over an enhanced physical downlink control channel(EPDCCH), information carried over a physical downlink shared channel(PDSCH), and a channel state information-reference signal (CSI-RS).

Optionally, each resource set includes indication information of atleast one of a time-domain resource and a frequency-domain resource thatare of a preset quantity and at a preset position, and resourcesindicated by the at least one resource set do not overlap, or partiallyoverlap.

Optionally, each resource set includes indication information of atleast one of a time-domain resource and a frequency-domain resource thatare of a same quantity and at a preset position, and resources indicatedby the at least one resource set do not overlap, or partially overlap.

Optionally, the resources indicated by the at least one resource set arein an inclusion relationship, and after the at least one resource set issorted in ascending order of a quantity of indicated resources,resources indicated by a current resource set always include allresources indicated by a previous resource set.

Optionally, when each resource set of the at least one resource setindicates that resource elements (REs) that carry the initialinformation are of a same quantity and at same positions in radio framesof each resource set, the output device 420 may further map the initialinformation to the resource elements (REs) that are of the same quantityand at the same positions in the radio frames of each resource set, andsend the initial information to the terminal.

Referring to FIG. 9, an embodiment of a communications system accordingto an embodiment of the present invention includes: a terminal 30 and abase station 40.

The terminal 30 is configured to receive initial information accordingto at least one preset resource set, where the at least one resource setis used to indicate a resource used to receive the initial information.

The base station 40 is configured to send the initial informationaccording to at least one preset resource set, where the at least oneresource set is used to indicate a resource used to send the initialinformation.

A person of ordinary skill in the art may understand that all or some ofthe steps of the methods in the embodiments may be implemented by aprogram instructing relevant hardware. The program may be stored in acomputer-readable storage medium. The storage medium may include: a ROM,a RAM, a magnetic disk, an optical disc, or the like.

The foregoing has described an information acquiring method, a terminal,and a system according to embodiments of the present invention indetail. Specific examples are used herein to describe the principles andimplementation manners of the present invention. The description of theembodiments is merely intended to help understand the method of thepresent invention and core ideas thereof. In addition, a person ofordinary skill in the art can make various modifications and variationsto the present invention with respect to specific implementation mannersand application scopes according to the ideas of the present invention.In conclusion, the content of the specification shall not be construedas a limitation on the present invention.

What is claimed is:
 1. A method comprising: sending indicatinginformation, wherein the indicating information indicates a resource setused for sending initial information, and the initial informationcomprises a master information block (MIB); and determining, accordingto the resource set used for sending initial information, a resourceused for sending non-initial information, wherein the non-initialinformation comprises information carried over a physical downlinkshared channel (PDSCH), and the resource used for sending thenon-initial information does not overlap with the resource set used forsending initial information.
 2. The method according to claim 1, furthercomprising: sending, according to a rate matching algorithm, thenon-initial information using the resource used for sending thenon-initial information.
 3. The method according to claim 1, furthercomprising: sending the initial information using the resource setindicated by the indicating information.
 4. The method according toclaim 1, wherein the indicating information is carried in a systeminformation block (SIB).
 5. The method according to claim 1, whereindetermining, according to the resource set used for sending initialinformation, the resource used for sending the non-initial information,comprises: determining, according to the resource set used for sendingthe initial information, the resource used for sending the non-initialinformation, wherein the resource used for sending the non-initialinformation does not overlap with the resource set used for sending theinitial information.
 6. A base station, comprising: a transmitter,configured to send indicating information, wherein the indicatinginformation indicates a resource set used for sending initialinformation, and the initial information comprises a master informationblock (MIB); and a first processor, configured to: determine, accordingto the resource set used for sending initial information, a resourceused for sending non-initial information, wherein the non-initialinformation comprises information carried over a physical downlinkshared channel (PDSCH), and the resource used for sending thenon-initial information does not overlap with the resource set used forsending the initial information.
 7. The base station according to claim6, wherein the transmitter is further configured to send, according to arate matching algorithm, the non-initial information using the resourceused for sending the non-initial information.
 8. A system comprising:the base station according to claim 7; and a terminal, comprising: areceiver, configured to receive the indicating information from the basestation; a second processor; and a memory storing a program to beexecuted by the second processor, the program comprising instructions todetermine, according to the resource set indicated by the indicatinginformation, the resource used for receiving the non-initialinformation.
 9. The base station according to claim 6, wherein thetransmitter is further configured to send the initial information usingthe resource set indicated by the indicating information.
 10. The basestation according to claim 6, wherein the indicating information iscarried in a system information block (SIB).
 11. The base stationaccording to claim 6, wherein the first processor is further configuredto: determine the resource used for sending the non-initial information,wherein the resource used for sending the non-initial information doesnot overlap with the resource set used for sending the initialinformation.
 12. An apparatus, comprising: one or more processors; and anon-transitory computer-readable storage medium includingcomputer-executable instructions executable by the one or moreprocessors, the computer-executable instructions comprising instructionsfor: sending indicating information, wherein the indicating informationindicates a resource set used for sending initial information, and theinitial information comprises a master information block (MIB); anddetermining, according to the resource set used for sending the initialinformation, a resource used for sending non-initial information,wherein the non-initial information comprises information carried over aphysical downlink shared channel (PDSCH), and the resource used forsending non-initial information does not overlap with the resource setused for sending initial information.
 13. The apparatus according toclaim 12, wherein the computer-executable instructions further compriseinstructions for: sending, according to a rate matching algorithm, thenon-initial information using the resource used for sending non-initialinformation.
 14. The apparatus according to claim 12, wherein thecomputer-executable instructions further comprise instructions for:sending the initial information using the resource set indicated by theindicating information.
 15. The apparatus according to claim 12, whereinthe indicating information is carried in a system information block(SIB).
 16. The apparatus according to claim 12, wherein thecomputer-executable instructions further comprise instructions for:determining the resource used for sending the non-initial information,wherein the resource used for sending the non-initial information doesnot overlap with the resource set used for sending initial information.17. A non-transitory storage medium, comprising instructions, which,when executed, cause a processor perform the following steps: sendingindicating information, wherein the indicating information indicates aresource set used for sending initial information, and the initialinformation comprising a master information block (MIB); anddetermining, according to the resource set used for sending the initialinformation, a resource used for sending non-initial information,wherein the non-initial information comprises information carried over aphysical downlink shared channel (PDSCH), and the resource used forsending non-initial information does not overlap with the resource setused for sending initial information.
 18. The non-transitory storagemedium according to claim 17, wherein the steps further comprise:sending the non-initial information by using the resource used forsending non-initial information according to a rate matching algorithm.19. The non-transitory storage medium according to claim 17, wherein thesteps further comprise: sending the initial information using theresource set indicated by the indicating information.
 20. Thenon-transitory storage medium according to claim 17, wherein theindicating information is carried in a system information block (SIB).21. The non-transitory storage medium according to claim 17, wherein thesteps further comprise: determining the resource used for sendingnon-initial information, wherein the resource used for sendingnon-initial information does not overlap with the resource set used forsending initial information.